Describe the bug

Sub sub navigation not scaling

To Reproduce

Create a long page name for the sub sub level.

Expected behavior

The background should scale along with the content,.

Additional context

By default in the _nav.scss on line 206 it says: width: 100%;
If you repace that with white-space: nowrap; the issue is solved.

(i tried to create a pull request but somehow that failed, must be something in my system)